Office chair



FIG. 1 is a right, front perspective view of a first embodiment of anoffice chair embodying our design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a right, front perspective view of a second embodiment of anoffice chair embodying our design;

FIG. 7 is a front view thereof;

FIG. 8 is a rear view thereof;

FIG. 9 is a left side view thereof; and,

FIG. 10 is a right side view thereof.

CLAIM The ornamental design for an office chair, as shown and described.